Having been on a place where LOOC usage was policed heavily, it felt dumb there and adds extra work for admins for things as minor as the occasional OOC comment for a little laugh - it used to happen a lot on the server that must not be named, and honestly felt like an excuse for mods and admins to bwoink people for literally nothing. There just isn't a huge need to police it, If someone is abusing it to post a ridiculous amount you can always mute it. You don't have to tape up other peoples mouths because you can't stand them having a chat. The only thing that I think that should be against the rules, is your third example where someone moans about someone else's gameplay/roleplay and kind of already is against the 'don't be a dick rule' LOOC or not.
Does it get in the way of roleplay sometimes? Eh, I tend to find that if you start talking ICly again; you can pull everyone back into the room, it's never been an issue for me.
People are always going to want to say things like 'this reminds me of this' and most of the time when that happens all of the LOOC interactions are quite positive as people have a little wholesome moment where they remember a previous round or something they've all experienced.